diff options
author | Wonjoon Lee <woojoo.lee@samsung.com> | 2015-09-02 13:41:27 +0900 |
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committer | chrome-bot <chrome-bot@chromium.org> | 2015-09-11 00:45:38 -0700 |
commit | 8acda59faaf9b71768a95ec2c36eb756c7643194 (patch) | |
tree | 8fb56f59b64716bb4d2c3bcb7b6390e128f398a9 /driver/temp_sensor/ec_adc.h | |
parent | 502dc50f04c5df787e95982cef4971b20e501cba (diff) | |
download | chrome-ec-8acda59faaf9b71768a95ec2c36eb756c7643194.tar.gz |
driver/temp_sensor: Add support thermistor on EC's own ADC
Add support for ADC / thermistor reads on the EC's ADC
This will support now only ncp15wb but we can expand it
at future time.
BUG=chrome-os-partner:44764
TEST=make buildall -j
Manual on celes with subsequent commit. Boot to S0, run "temps".
Verify that temperatures are. See temperature is changing
BRANCH=None
Change-Id: If26d24b803dcff00c4c24e4e1f71d3b0de8e6738
Signed-off-by: Wonjoon Lee <woojoo.lee@samsung.com>
Reviewed-on: https://chromium-review.googlesource.com/296872
Reviewed-by: Shawn N <shawnn@chromium.org>
Diffstat (limited to 'driver/temp_sensor/ec_adc.h')
-rw-r--r-- | driver/temp_sensor/ec_adc.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/driver/temp_sensor/ec_adc.h b/driver/temp_sensor/ec_adc.h new file mode 100644 index 0000000000..8ff213e95d --- /dev/null +++ b/driver/temp_sensor/ec_adc.h @@ -0,0 +1,24 @@ +/* Copyright 2015 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +/* ec_adc which uses adc and thermistors module for Chrome EC + * Some EC has it's own ADC modules, define here EC's max ADC channels. + * We can consider every channel as a thermal sensor. + */ + +#ifndef __CROS_EC_TEMP_SENSOR_EC_ADC_H +#define __CROS_EC_TEMP_SENSOR_EC_ADC_H + +/** + * Get the latest value from the sensor. + * + * @param idx ADC channel to read. + * @param temp_ptr Destination for temperature in K. + * + * @return EC_SUCCESS if successful, non-zero if error. + */ +int ec_adc_get_val(int idx, int *temp_ptr); + +#endif /* __CROS_EC_TEMP_SENSOR_EC_ADC_H */ |